Explanation

Accommodation is the automatic process by which the eye adjusts its focus to form a sharper image of a near object.

This is achieved by changing the shape of the lens, making it more convex to increase its power and converge light rays more strongly.

Explanation

Plants exhibit chemical coordination, also known as hormonal coordination, which involves the use of plant hormones or phytohormones to coordinate activities such as:

• Cell growth and differentiation
• Root and stem elongation
• Leaf senescence
• Flowering and fruiting
• Response to environmental stimuli

Explanation

A reflex action is a rapid, automatic response to a stimulus.

The simplest reflex arc involves only two neurons:

1. Sensory neuron (afferent): carries information from the receptor to the spinal cord
2. Motor neuron (efferent): carries the response from the spinal cord to the effector (muscle or gland)

Key Point:

The longest reflex pathway involves multiple neurons.

It is called a "long reflex" or " polysynaptic reflex".

Explanation

The autonomic nervous system (ANS), also known as the visceral nervous system.

It regulates involuntary vital functions essential for survival, such as:

• Heart rate
• Blood pressure
• Respiration
• Digestion
• Body temperature
• Pupil dilation and constriction

Explanation

Hormones are chemicals released by endocrine cells or glands.

That are carried through the bloodstream to reach distant cells, organs, or tissues, where they regulate various physiological processes.

Explanation

Nervous coordination involves the transmission of electrochemical signals.

It is also known as nerve impulses or action potentials, through the nervous system.

This allows for rapid communication and coordination between different parts of the body.

Explanation

A stimulus is detected by a receptor.

It is a specialized cell or structure that converts the stimulus into an electrical signal that can be transmitted to the nervous system.

Explanation

A response is the organism's reaction or adaptation to a change in the environment.

Such as a change in temperature, light, or sound.

Explanation

ADH (Antidiuretic Hormone), also known as vasopressin.

It is released by the hypothalamus in the brain and stored in the posterior pituitary gland.

ADH regulates water reabsorption in the kidneys, leading to increased water retention and decreased urine production.

Explanation

• Selective reabsorption primarily occurs in the proximal convoluted tubule (PCT).
• To a lesser extent, in the distal convoluted tubule (DCT), where essential nutrients, water, and ions are reabsorbed back into the bloodstream.